For Emma Mostrom-Mombelli, a scuba diving instructor in Thailand for the past two years and a former divemaster in the U.K., a typical workday often entails diving deep into the depths of some of the world's most beautiful oceans alongside a rotating cast of silent amphibious co-workers. The ambitious maritime adventuress recently spoke with PayScale to share some of her favorite things about diving, teaching, and what it takes to pursue a career in scuba diving.